Linux Mail Server Setup and Howto Guide

This article will show you how to setup an LDAP address book using OpenLDAP, an open source implementation of the Lightweight Directory Access Protocol.

SMTP Authentication (SMTP Auth) provides an access control mechanism that can be used to allow legitimate users to relay mail while denying relay service to unauthorized users, such as spammers.

The Postfix Cyrus SASL support is used to authenticate remote SMTP clients to the Postfix SMTP server. Thanks to the Pluggable Authentication Modules (PAM) in Linux, we can configure Cyrus SASL to delegate the authentication process to an Active Directory server.

LDAP authentication is available in Dovecot starting version 1.0. Since Active Directory is an implementation of LDAP directory services, we can use the LDAP authentication to authenticate Dovecot against an Active Directory server. But for users of Dovecot prior to 1.0 or those having problems with LDAP authentication, we can instead use the Kerberos authentication mechanism in Windows via the Linux PAM.

This guide will show you how to integrate Active Directory/LDAP into Postfix and Dovecot. In this page, you will learn how to enable Postfix to lookup email addresses in LDAP and how to enable Dovecot to authenticate to an LDAP server.

This article will show you how to join your Linux server into the Active Directory domain, how to integrate the Active Directory user accounts into the Linux user accounts and how to authenticate users in Active Directory using Winbind, a component of Samba.

This page will guide you in configuring MailScanner, ClamAV and SpamAssassin to work in Postfix. Before proceeding, please make sure that all of the above components are already installed.

Installing and setting up Postfix SMTP Server in Red Hat Enterprise Linux 5 or CentOS 5 is easy. Postfix has secure default settings so we just need to open it up a bit.

MailScanner is an open source anti-virus and anti-spam filter for email servers. The anti-virus and anti-spam portion is delegated to third party applications. This article describes how to install MailScanner.

To install Clam AntiVirus (ClamAV), we are going to use the precompiled binaries from the RPMforge repository. Learn how to add the RPMforge repository.